You call it self-censorship. I call it opsec. In case you haven't noticed, we don't live in a "liberal democracy". We live in a police state, where anything you say or write can be held against you, and you're lucky if it happens in a court of law.
If this is really the problem conservatives claim it is, there's a simple solution: Get a backbone and delete your social media accounts. Most platforms (unlike HN) provide account deletion functions (though some keep them well-hidden).
Who do rich people expect everybody else to buy their products if they're broke after paying down student loans, paying rent, and paying all the other bills?
Henry Ford figured this out a century ago. What's your excuse?
Considering all of the malfeasance we've seen on the part of companies providing data-hungry web apps, I'm going to pass on using Slack for anything I'm not required to do in order to keep getting a paycheck. My professional diary is too important to me to trust to Slack, or to any cloud application.
I read it, and I lurked in the thread in question. It looks more like HN called you out on your bullshit. Why do you even need a SPA for a blog? Who are you trying to impress?